<table class="texreg" style="margin: 10px auto;border-collapse: collapse;border-spacing: 0px;caption-side: bottom;color: #000000;border-top: 2px solid #000000;">
<caption>Statistical models</caption>
<thead>
<tr>
<th style="padding-left: 5px;padding-right: 5px;">&nbsp;</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 1</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 2</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 3</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 4</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 5</th>
<th style="padding-left: 5px;padding-right: 5px;">Model 6</th>
</tr>
</thead>
<tbody>
<tr style="border-top: 1px solid #000000;">
<td style="padding-left: 5px;padding-right: 5px;">(Intercept)</td>
<td style="padding-left: 5px;padding-right: 5px;">2.25<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.19<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.21<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.43<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.24<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.25<sup>&#42;&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.31)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.59)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.58)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.32)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.59)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.59)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">gen</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.01</td>
<td style="padding-left: 5px;padding-right: 5px;">0.11</td>
<td style="padding-left: 5px;padding-right: 5px;">0.07</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.06</td>
<td style="padding-left: 5px;padding-right: 5px;">0.08</td>
<td style="padding-left: 5px;padding-right: 5px;">0.04</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.26)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.33)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.26)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.33)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">age</td>
<td style="padding-left: 5px;padding-right: 5px;">0.41</td>
<td style="padding-left: 5px;padding-right: 5px;">0.02</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.15</td>
<td style="padding-left: 5px;padding-right: 5px;">0.42</td>
<td style="padding-left: 5px;padding-right: 5px;">0.01</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.15</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.27)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.36)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.35)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.27)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.36)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.35)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">edu</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.01</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.03</td>
<td style="padding-left: 5px;padding-right: 5px;">0.07</td>
<td style="padding-left: 5px;padding-right: 5px;">0.02</td>
<td style="padding-left: 5px;padding-right: 5px;">0.01</td>
<td style="padding-left: 5px;padding-right: 5px;">0.09</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.26)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.26)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.34)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">com</td>
<td style="padding-left: 5px;padding-right: 5px;">1.12<sup>&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.52</td>
<td style="padding-left: 5px;padding-right: 5px;">0.24</td>
<td style="padding-left: 5px;padding-right: 5px;">1.26<sup>&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.57</td>
<td style="padding-left: 5px;padding-right: 5px;">0.28</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.52)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.75)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.74)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.52)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.75)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.75)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">cot</td>
<td style="padding-left: 5px;padding-right: 5px;">0.18</td>
<td style="padding-left: 5px;padding-right: 5px;">0.19</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.14</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.93</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.51</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.73</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.45)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.59)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.57)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.63)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.87)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.84)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">comena</td>
<td style="padding-left: 5px;padding-right: 5px;">0.14</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.14</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.18</td>
<td style="padding-left: 5px;padding-right: 5px;">0.18</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.11</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.15</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.43)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.52)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.51)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.43)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.53)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.51)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">RelDn</td>
<td style="padding-left: 5px;padding-right: 5px;">2.91<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.12<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.32<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.86<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.11<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">2.32<sup>&#42;&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.41)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.56)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.54)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.41)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.56)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.54)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">RelSv</td>
<td style="padding-left: 5px;padding-right: 5px;">0.19<sup>&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.18</td>
<td style="padding-left: 5px;padding-right: 5px;">0.22<sup>&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.09</td>
<td style="padding-left: 5px;padding-right: 5px;">0.13</td>
<td style="padding-left: 5px;padding-right: 5px;">0.19</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.10)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.13)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.13)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.10)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.14)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.14)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">netCN</td>
<td style="padding-left: 5px;padding-right: 5px;">0.24<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.20<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.21<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.24<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.20<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.21<sup>&#42;&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.06)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.07)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.07)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.06)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.07)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.07)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">SocMe</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.09</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.09</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.08</td>
<td style="padding-left: 5px;padding-right: 5px;">-0.08</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.12)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.12)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.12)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.12)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">IMEP_net</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.00<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.00<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.18)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.18)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">IMEP_ptn</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.56<sup>&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.55<sup>&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.62)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.62)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">IMEP_parTRUE</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.97<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.92<sup>&#42;&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.56)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.57)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">IMEP_friTRUE</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.48<sup>&#42;&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">1.49<sup>&#42;&#42;&#42;</sup></td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.46)</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.46)</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">RelSv:cot</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">0.63<sup>&#42;&#42;</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.43</td>
<td style="padding-left: 5px;padding-right: 5px;">0.37</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">&nbsp;</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.25)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.40)</td>
<td style="padding-left: 5px;padding-right: 5px;">(0.39)</td>
</tr>
<tr style="border-top: 1px solid #000000;">
<td style="padding-left: 5px;padding-right: 5px;">R<sup>2</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.35</td>
<td style="padding-left: 5px;padding-right: 5px;">0.44</td>
<td style="padding-left: 5px;padding-right: 5px;">0.45</td>
<td style="padding-left: 5px;padding-right: 5px;">0.36</td>
<td style="padding-left: 5px;padding-right: 5px;">0.45</td>
<td style="padding-left: 5px;padding-right: 5px;">0.45</td>
</tr>
<tr>
<td style="padding-left: 5px;padding-right: 5px;">Adj. R<sup>2</sup></td>
<td style="padding-left: 5px;padding-right: 5px;">0.34</td>
<td style="padding-left: 5px;padding-right: 5px;">0.42</td>
<td style="padding-left: 5px;padding-right: 5px;">0.42</td>
<td style="padding-left: 5px;padding-right: 5px;">0.34</td>
<td style="padding-left: 5px;padding-right: 5px;">0.42</td>
<td style="padding-left: 5px;padding-right: 5px;">0.42</td>
</tr>
<tr style="border-bottom: 2px solid #000000;">
<td style="padding-left: 5px;padding-right: 5px;">Num. obs.</td>
<td style="padding-left: 5px;padding-right: 5px;">422</td>
<td style="padding-left: 5px;padding-right: 5px;">224</td>
<td style="padding-left: 5px;padding-right: 5px;">233</td>
<td style="padding-left: 5px;padding-right: 5px;">422</td>
<td style="padding-left: 5px;padding-right: 5px;">224</td>
<td style="padding-left: 5px;padding-right: 5px;">233</td>
</tr>
</tbody>
<tfoot>
<tr>
<td style="font-size: 0.8em;" colspan="7"><sup>&#42;&#42;&#42;</sup>p &lt; 0.01; <sup>&#42;&#42;</sup>p &lt; 0.05; <sup>&#42;</sup>p &lt; 0.1</td>
</tr>
</tfoot>
</table>

